.pack_up {
    text-align: center;
    width: 50px;
    border-right: 1px solid #E2E2E2;
    height: 40px;
    line-height: 45px;
    padding-left: 5px;
    position: relative;
}
.pack_up:before {
    display: block;
    content: "";
    position: absolute;
    border: 5px solid transparent;
    border-right-color: #16a4fa;
    width: 0px;
    height: 0px;
    top: 13px;
}